Sevilla sports chief Monchi branded Barcelona coach Ronald Koeman a "cryer" during defeat on Sunday.
Monchi was unimpressed after seeing Diego Carlos booked during the game.
And at the top of his voice, in the empty stadium, Monchi was heard shouting at the ref: "The cryer's statements have had an effect."
Monchi was referring to the complaints of Koeman after Sevilla's Copa del Rey first-leg victory over Barca, where the coach was convinced Jordi Alba deserved to be awarded a penalty.
In reaction to Monchi's blast, the Dutchman stared at the Sevilla chief before giving him a thumbs up.